No. I don’t hate promoting. You just have to learn patience. I experienced this with my first comic for its first year. I think there’s a couple things you have to keep in mind. Let me offer you a perspective that pertains to growing an audience. If you don’t think this applies to you, then disregard.
First, a lot of people who seem to blow up quickly at their launch usually have a follower base on a different platform that they used to promote their comic. Or even have a first comic that they used to promote their second.
Second, you are extremely unlikely to grow just by posting on the app. You have to reach out on social media and engage with Webtoons socials and discord servers to increase chances of getting noticed by staff but even that is no guarantee.
Then third, getting a comic book agent isn’t impossible, but definitely tricky. Traditional comic book publishers, however, are a bit more difficult to pitch to as a solo writer (like in my case). Comic publishers like seeing concept art, preview pages, and other stuff that will help them visualize the final product. Not having someone attached can make it harder to sell a book to them. It’s not impossible, but they definitely prefer to have that stuff attached and lined up. If they really like a concept, it’s no problem to help put a team together, but art always helps sell a book.
Anyways, comics are a lot of work and building an audience is a lot of time and effort. It can takes years to grow and you’ll likely need really thick skin.